PMB31D-10114-00

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The PMB31D-10114-00 is a NEMA Size 34 brushless servomotor featuring a continuous stall torque of 2.11 Nm and a peak torque of 6.26 Nm. Manufactured by Pacific Scientific as part of their PMB Brushless Servomotors series, it weighs 2.5 kg and includes flying leads with AMP connectors, operating at a rated speed of 2,900 RPM.

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Product Description:

The PMB31D-10114-00 Servo Motor> of < combines a digital encoder with commutation and provides 2048 pulses per revolution. Its no load speed of 8400 rpm shows a good dynamic performance and its static friction rating of 0.09 Nm makes it very applicable in applications where quick response and high precision is needed.

The < has an inertia of 0.137 kgm² × 10⁻³ which makes it highly suitable for applications that require quick response and precise control. It has a current consumption at peak torques of 15.6 amperes indicating that it can handle high load requirements when peak torques are needed. The motor round shaft design improves mechanical compatibility that becomes easy to couple with a variety of couplings or gears or pulleys. Its rated speed of 5000 rpm allows it to trade high rotational speed with controlled delivery of torque and to work effectively in both continuous and intermittent duty cycles. The module 28 mints of thermal time constant highlights its capacity to dissipate heat effectively. Its flying leads with AMP connectors for electrical connections provide secure and flexible wiring solutions. It operates at 240 V AC and 320 V DC indicating that it is designed to be used in alternating and direct current supply systems with good torque density, high efficiency and constant operation.

The PMB31D-10114-00 being an 8 pole synchronous servomotor offers excellent torque density, high efficiency and stable operation. This PMB series motor with a peak rated torque of 6.2 Nm provides powerful mechanical power. The nominal stall current of 5.4 ARMS of this module means that it is capable of carrying loads without affecting its performance or reliability. The viscous damping coefficient of 0.0124 Nm/kRPM helps in decreasing the oscillations and in smoother control of motion. 

Connector Type
Flying leads with AMP connectors
Continuous Stall Torque
2.11 Nm (18.7 lb-in)
Encoder Resolution
2048 ppr
Inertia
0.137 kgm²×10⁻³ (1.21 lb-in-s²×10⁻³)
Motor Size
NEMA Size 34
Nominal Stall Current @240vac Max
5.4 ARMS
Peak Torque
6.26 Nm (55.4 lb-in)
Sensor Type
Digital Encoder with commutation
Stack Length Multiple
1
Static Friction (max)
0.09 Nm (0.80 lb-in)
Thermal Resistance
1.08 °C/Watt
Thermal Time Constant
28 min
Torque Constant (rms)
0.79 Nm/ARMS (7.03 lb-in/ARMS)
Viscous Damping Coefficient
0.0124 Nm/kRPM (0.110 lb-in/kRPM)
Weight (motor Only)
2.5 kg (5.5 lbs)
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Frequently Asked Questions about PMB31D-10114-00:

Q: How does low rotor inertia affect the PMB31D-10114-00’s performance?

A: Its low inertia enables very quick acceleration and deceleration. This makes it highly responsive for robotics, automation, and other dynamic applications.

Q: Why is the static friction specification important in this servo motor?

A: Low static friction reduces the resistance when the motor starts moving. This leads to smoother motion and more accurate positioning.

Q: What does the digital encoder on the PMB31D-10114-00 provide?

A: The integrated encoder measures shaft position with high resolution. This feedback allows for precise speed regulation and reliable closed-loop control.

Q: How does a round shaft benefit the PMB31D-10114-00?

A: The round shaft simplifies mechanical integration with couplings, pulleys, and gears. It ensures compatibility with standard drive components in automation systems.

Q: Can the PMB31D-10114-00 handle high load conditions?

A: Yes, it is designed to deliver strong torque when maximum load is required. This ensures stable performance without compromising efficiency.


Internal Product Review

  • ‘‘The PMB31D‑10114‑00 servo motor by Pacific Scientific is a high‑performance 8‑pole synchronous unit. It delivers exceptional inertial responsiveness and smooth motion thanks to its low inertia (0.137 kg·m²×10⁻³) and viscous damping (0.0124 Nm/kRPM). It is often used in light-industrial, high-volume automation and precision positioning systems.’’

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